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 Volume 1  |  22 Feb. 1876   |  Page 25  TD> |

Primary circuit Secondary circuit Poles Pitch
(k) two cells one cell n n d (1/2 b)
(l) two cells one cell n s d (1/2 b)
(m) one cell two cells n n t.
(n) one cell two cells n s t.
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 Volume 1  |  22 Feb. 1876   |  Page 25  TD> |